CN102910780A - Device and method for processing high-salinity degradation-resistant waste water - Google Patents
Device and method for processing high-salinity degradation-resistant waste water Download PDFInfo
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- CN102910780A CN102910780A CN2012102341730A CN201210234173A CN102910780A CN 102910780 A CN102910780 A CN 102910780A CN 2012102341730 A CN2012102341730 A CN 2012102341730A CN 201210234173 A CN201210234173 A CN 201210234173A CN 102910780 A CN102910780 A CN 102910780A
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Abstract
The invention relates to a device for processing high-salinity degradation-resistant waste water. The device comprises a salinity homogenizing pool and an anaerobic device, wherein the anaerobic device is internally provided with a plurality of suspended filler layers and a plurality of sections of baffle plates from bottom to top, and halophilic microorganisms are adhered on the suspended filler layers. The invention further relates to a method for processing high-salinity degradation-resistant waste water. The method comprises the steps of domesticating, pretreating and bioprocessing halophilic microbial communities. According to the device and the method, the scope of salinity of the inflowing water is controlled through the salinity homogenizing pool, the anaerobic device is internally provided with the plurality of suspended filler layers and the plurality of sections of baffle plates, different grades of halophilic microorganism communities are adhered on the suspended filler layers, so that the anaerobic device and the treating method can adapt to waste water with gradient-changed salinity, reduce the influence of salinity change on the waste water treatment effect, and also improve the sludge concentration in the anaerobic device, and therefore, the degradation rate of organisms is improved. The device and the method are strong in salinity adaptability and wide in application range.
Description
Technical field
The present invention relates to water treatment field, particularly a kind of device and treatment process for the treatment of the supersalinity used water difficult to degradate.
Background technology
Along with industrial development, produced increasing supersalinity used water difficult to degradate, such as pharmaceutical wastewater, petroleum production wastewater, chemical industry and dyeing waste water etc., both contained a large amount of salinity (Cl in these waste water
-, Ca
2+, Na
+Plasma), containing again high concentration organic contaminant, is the technical barrier in the field of waste water treatment.
This type of waste water adopts physico-chemical process, biological process to process usually, owing to adopt physico-chemical process to process, investment is large, and working cost is high, and is difficult to reach the decontamination effect improving of expection, and therefore, biological process is still the emphasis of this type of wastewater processing technology research.The contained salts substances of high-salt-content organic wastewater mostly is Cl
-, SO
4 2-, Na
+, Ca
2+Deng material, if these ionic concns are too high, can suppress and toxic action microorganisms, and the salt of high density can cause sewage density to increase, the active sludge loss of easily floating, thus have a strong impact on the decontamination effect improving of biological treatment system.Therefore, conventional biological process is difficult to effectively process such waste water.
Biologic treating technique research for high salt hardly degraded organic substance waste water focuses mostly at present in the anaerobe technical elements, mainly comprises ABR technology, ASBBR technology, UASB technology etc.But there is following shortcoming in above-mentioned several technology:
Salinity adaptation is poor.To can improve the processing efficiency of high salt hardly degraded organic substance waste water after the sludge acclimatization, but when hypersaline environment is changed to fresh water environment, the very fast disappearance of the adaptability of mud, processing efficiency obviously reduces, and has a strong impact on the treatment effect of waste water.And the variation of salinity between 0.5-2% can produce serious interference to treatment system usually.
Degradation rate is slow.Along with the rising of salinity, organic degradation rate descends gradually.
Sludge loss is serious.Salinity change the composition of microorganism in the mud, changed precipitation threshold and the water outlet SS of mud, cause sludge loss serious, affect biochemical effect, and cause effluent quality to worsen.
These results of study show, it is feasible that the mud of supersalinity used water difficult to degradate utilization after domestication carries out biochemical treatment, improve its processing efficiency, must further improve the anti-salinity shock ability of Anaerobic treatment technique, improve the volumetric loading of reactor.
Summary of the invention
In order to overcome above-mentioned technical problem, the object of the present invention is to provide the treatment process of a kind of device for the treatment of the supersalinity used water difficult to degradate and a kind of supersalinity used water difficult to degradate.
The technical solution adopted in the present invention is:
A kind of device for the treatment of the supersalinity used water difficult to degradate, comprise salinity homogeneous pond and the anaerobic device of being intake by salinity homogeneous pond, described anaerobic device comprises the inhalant region of bottom, the reaction zone at middle part and the exhalant region at top, described inhalant region is provided with the water inlet manifold that is communicated with salinity homogeneous pond, described reaction zone is provided with a plurality of floating stuffing layers from the bottom to top, the equal correspondence of each floating stuffing layer is provided with one section traverse baffle, described traverse baffle is staggered is positioned the anaerobic device inwall, described floating stuffing layer is attached with halophilic microorganism group, and described exhalant region is provided with effluent weir, the rising pipe that is communicated with effluent weir and triphase separator.
Described salinity homogeneous pond is provided with the salinity measurement instrument of waste water in the measuring cell, and salinity homogeneous pond is provided with the waste water lifting device in the pond, and described waste water lifting device is connected with water inlet manifold, and a relative angle is provided with whipping appts in the described salinity homogeneous pond.
Described water inlet manifold is connected with some water inlet pipes, and described each water inlet pipe is " rice " shape and is evenly arranged in the anaerobic device bottom.
Described floating stuffing layer comprises a large amount of floating stuffings, and described floating stuffing is hexagon, has vesicular structure, and porosity is 80%-90%.
Described floating stuffing layer has four.
Described triphase separator comprises the multilayer incline-plate of equidistant layout, be connected with the support plate vertical with swash plate on every layer of swash plate, described support plate and swash plate form air chamber, gas is housed on the described support plate derives arm, described gas is derived arm and is connected with the gas eduction tube that is in communication with the outside, and described swash plate comprises the plane of reflection of below and the precipitation face of top.
Described anaerobic device bottom is provided with the mud return line that is communicated with anaerobic device inside.
A kind of method of processing the supersalinity used water difficult to degradate, realize by following steps:
A. in the different saline environment of salinity, tame out the halophilic microorganism group of different grades with many parts of halophilic microorganisms, and every group of halophilic microorganism group is attached in the floating stuffing layer, the floating stuffing layer is encased in the anaerobic device, and arranges from bottom to up by the salinity order from high to low of saline environment between domestication;
B. waste water enters salinity homogeneous pond, and saltness is controlled at 3%-5%, is promoted to anaerobic device by water inlet manifold;
C. waste water after anaerobic device bottom enters and the mud the anaerobic device contact, mix, remove the part hardly degraded organic substance by anaerobic sludge, waste water flows from bottom to top and passes through a plurality of floating stuffing layers and multistage traverse baffle, remove in a large number hardly degraded organic substance by the halophilic microorganism group that is attached on the floating stuffing layer, be translated into biogas, increase hydraulic detention time by traverse baffle; Biogas and treated mud mixture carry out three phase separation after entering triphase separator, and the mud after the flocculation reenters in the anaerobic device, and the water after the processing is discharged from rising pipe, and biogas is discharged anaerobic device.
In the domestication of described halophilic microorganism group, get the many portions of supernatant liquors that contain Facultative Halophiles and be inoculated into salinity and be respectively on 3%, 6%, 9%, 12% the film solid media, until grow the salt tolerant bacterium colony; Then get the immigration of salt tolerant colony inoculation and be equipped with in the corresponding liquid nutrient medium of identical salinity, under 30 ℃, carry out enrichment; After enrichment is finished the bacterium liquid in the liquid nutrient medium joined the autogamy salinity and be in 3%, 6%, 9%, 12% the corresponding waste water and tame cultivation, form halophilic microorganism group, and in joining waste water, add the suspension foam stuffing as carrier, halophilic microorganism group is adhered on it.
Described waste water detects salinity by the salinity measurement instrument in salinity homogeneous pond, mixed by whipping appts.
The invention has the beneficial effects as follows: the present invention is by the scope of salinity homogeneous pond control water inlet salinity, a plurality of floating stuffing layers and multistage traverse baffle are set in anaerobic device, make the halophilic microorganism group of different grades be attached on the filler, so that anaerobic device and this treatment process can adapt to the waste water that saltiness changes in gradient, reduced the impact of saltiness variation for water treatment effect, also improve simultaneously the sludge concentration in the anaerobic device, thereby improved organic degradation rate.Salinity adaptation of the present invention is strong, wide accommodation.
Description of drawings
The present invention is further described below in conjunction with drawings and embodiments.
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the scheme of installation of whipping appts in the salinity homogeneous of the present invention pond;
Fig. 3 is the synoptic diagram of floating stuffing of the present invention;
Fig. 4 is the synoptic diagram of triphase separator of the present invention;
Fig. 5 is that the interior process flow of apparatus of the present invention is to synoptic diagram.
Embodiment
As shown in Figure 1, a kind of device for the treatment of the supersalinity used water difficult to degradate, comprise salinity homogeneous pond 1 and the anaerobic device 2 of being intake by salinity homogeneous pond 1, anaerobic device 2 comprises the inhalant region of bottom, the reaction zone at middle part and the exhalant region at top, inhalant region is provided with the water inlet manifold 3 that is communicated with salinity homogeneous pond 1, reaction zone is provided with a plurality of floating stuffing layers 4 from the bottom to top, each floating stuffing 4 equal correspondence is provided with one section traverse baffle 5, floating stuffing layer 4 is attached with halophilic microorganism group, and exhalant region is provided with effluent weir 6, the rising pipe 7 that is communicated with effluent weir 6 and triphase separator 8.
Every section traverse baffle 5 staggered anaerobic device 2 inwalls that are positioned that all are upturned, become with the inwall of anaerobic device 2 45 degree, the length of traverse baffle 5 horizontal directions be anaerobic device 2 horizontal directions long 1/4.By the above-mentioned traverse baffle that is crisscross arranged 5, waste water has obtained enhancing by the residence time during the floating stuffing layer 4 from bottom to up.
As depicted in figs. 1 and 2, in a preferred embodiment, salinity homogeneous pond 1 is provided with salinity measurement instrument 11, and this detector is used for the salinity of waste water in the measuring cell, when in the pond during too high in salinity, can add clear water and dilute, and keeps the salinity of waste water in suitable scope.Salinity homogeneous pond is provided with waste water lifting device 12 at the bottom of 1 pond, and waste water lifting device 12 is connected with water inlet manifold 3, and the waste water in the pond is delivered in the anaerobic device 2.Two whipping apptss 13 also are housed in the salinity homogeneous pond 1, and these two whipping apptss 13 are oppositely arranged, and on two angles at the bottom of the pond, prevent the unbalanced of salinity in the pond by stirring.
As preferred embodiment, water inlet manifold 3 is connected with some water inlet pipes 31, each water inlet pipe 31 is " rice " shape and is evenly arranged in anaerobic device 2 bottoms, the water distributing pore of water inlet pipe 31 be dispersed in anaerobic device 2 bottoms around, guaranteed the homogeneity of water inlet.
As shown in Figure 3, as preferred embodiment, floating stuffing layer 4 is comprised of a large amount of floating stuffings, and this floating stuffing is a kind of suspension foam stuffing of high-affinity, adopts the composite polyurethane material to make density 1.2～1.3g/cm
3, it has vesicular structure, and porosity is up to 80%～90%, and specification is 1*1*1cm, is regular hexagon.Because this filler has very large porosity, active sludge and microorganism well are attached to the space of filler, have high-affinity, so that reaction is more abundant.
As preferred embodiment, floating stuffing layer 4 has four, and each floating stuffing layer 4 all is attached with halophilic microorganism group.Therefore, the zone at floating stuffing layer 4 place is main reaction region of the present invention.
As shown in Figure 4, as preferred embodiment, triphase separator 8 comprises the multilayer incline-plate 81 of equidistant layout, be connected with the support plate 82 vertical with swash plate 81 on every layer of swash plate 81, these support plate 82 oblique having a down dip, support plate 82 forms air chamber with swash plate 81, gas is housed on the support plate 82 derives arm 83, gas is derived arm 83 and is connected with the gas eduction tube 84 that is in communication with the outside, and many gas is derived arm 83 and all is connected to gas everywhere on the pipe.Support plate 82 is crossed fluid space with adjacent swash plate 81 formation one, and water and mud can flow through from cross fluid space.Swash plate 81 comprises the plane of reflection 811 of below and the precipitation face 812 of top, in the process that water and mud flow vertically upward, change obliquely flowing to through plane of reflection 811, water continues to rise, from effluent weir 6, flow out at last, after the sludge flocculation precipitation, under action of gravitation, flow back to the anaerobic device 2 recycle from precipitation face 812.By being provided with triphase separator 8, effectively reduced the sludge loss in the anaerobic device 2.
As preferred embodiment, anaerobic device 2 bottoms are provided with the mud return line 9 that is communicated with anaerobic device 2 inside, have further prevented the loss of mud.
A kind for the treatment of process of supersalinity used water difficult to degradate is used with the device of above-mentioned processing supersalinity used water difficult to degradate, can effectively process the saltiness used water difficult to degradate, and this method realizes by following steps.
(1) halophilic microorganism group domestication.
Halophilic microorganism is that the suitableeest salt concn of growth is greater than the 0.2mol/L(muriate) microorganism, effective degradable organic pollutant in active sludge.Halophilic microorganism relies in the environment that is grown in high salt concentration that the adjusting of solute concentration in the salt discharge effect have a liking for salt cell and the cell can be stable.
In the different saline environment of salinity, can tame out the halophilic microorganism group of different grades with many parts of halophilic microorganisms, more every group of halophilic microorganism group is attached in the floating stuffing layer 4.Whole domestication process is such: get the many portions of supernatant liquors that contain Facultative Halophiles and be inoculated into salinity and be respectively on 3%, 6%, 9%, 12% the film solid media, until grow the salt tolerant bacterium colony; Then get the immigration of salt tolerant colony inoculation and be equipped with in the corresponding liquid nutrient medium of identical salinity, under 30 ℃, carry out enrichment; After enrichment is finished the bacterium liquid in the liquid nutrient medium joined the autogamy salinity and be in 3%, 6%, 9%, 12% the corresponding waste water and tame cultivation, form the halophilic microorganism group of four grades, the halophilic microorganism group of wherein taming in the 12% salinity waste water is highest ranking; Afterwards, in joining waste water, add the suspension foam stuffing as carrier, halophilic microorganism group is adhered on it, the concentration of the halophilic microorganism in the mud is provided, also greatly improved the organic matter degradation efficient in the waste water simultaneously.At last the suspension foam stuffing is encased in the anaerobic device 2, and arrange from bottom to up by the salinity order from high to low of saline environment between domestication, namely adhere to the suspension foam stuffing of highest ranking halophilic microorganism group at orlop, and successively decrease successively from the bottom up.So, in the brine waste treating processes from inlet water to outlet water, first by the waste water of high-grade halophilic microorganism group processing than high salinity, the waste water salinity enters in the halophilic microorganism group of next grade after reducing again, strengthen like this adaptability that is attached to halophilic microorganism group in the suspension foam stuffing, guaranteed stable treatment effect.
(2) pre-treatment.
Waste water enters salinity homogeneous pond 1, and the salinity by salinity measurement instrument 11 detects in the waste water is controlled at 3%-5% to saltness, waste water more than 5% salinity is diluted, mixed by whipping appts 13, guarantee that waste water is mesohaline average, be promoted to anaerobic device 2 from water inlet manifold 3 again.
(3) biological treatment.
As shown in Figure 5, waste water from anaerobic device 2 bottoms enter after with anaerobic device 2 mud contact, mix, remove the part hardly degraded organic substance by anaerobic sludge, waste water flows and suspension foam stuffing and multistage traverse baffle 5 by different grades from bottom to top, remove in a large number hardly degraded organic substance by the halophilic microorganism group that is attached on the floating stuffing layer 4, be translated into biogas, increase hydraulic detention time by traverse baffle 5.
Biogas is constantly emitted with the micro-bubble form, and micro-bubble constantly merges in uphill process, forms gradually larger bubble, because the stirring of biogas forms a thinner sludge blanket, and water rises together and enters triphase separator 8 on Sludge Bed top; When biogas is run into the plane of reflection 811 of triphase separator 8 swash plates 81, enter air chamber, derive the biogas that concentrates in the air chamber with gas derivation arm 83 and gas eduction tube 84; Muddy water mixed solution continues the settling region that rising enters triphase separator 8 through reflection, mud in the sewage flocculates, particle increases gradually, and sedimentation under action of gravity, flow back in the anaerobic device 2 from the precipitation face 812 of swash plate 81, make a large amount of mud of accumulation in the device, overflow from effluent weir 6 tops with the processing water outlet after mud separates, discharged by rising pipe 7.
Through overtesting, this device and method has good COD clearance and lower sludge loss rate.
In the test 1, process object: pharmacy waste water: COD is 4689～6700 mg/L, and saltness is that 5%, pH is 10～11; Test-results shows that the sludge loss rate is controlled in 5%, and the COD clearance is all greater than 811%.
In the test 2, process object: percolate: COD is 5560～7980 mg/L, and saltness is that 3%, pH is 6～8; Test-results shows that the sludge loss rate is controlled in 10%, does not affect sludge activity, and the COD clearance is all greater than 78%.
The above is the preferred embodiment of the present invention, and it does not consist of limiting the scope of the invention.
Claims (10)
1. device for the treatment of the supersalinity used water difficult to degradate, it is characterized in that: comprise salinity homogeneous pond (1) and the anaerobic device (2) of being intake by salinity homogeneous pond (1), described anaerobic device (2) comprises the inhalant region of bottom, the reaction zone at middle part and the exhalant region at top, described inhalant region is provided with the water inlet manifold (3) that is communicated with salinity homogeneous pond (1), described reaction zone is provided with a plurality of floating stuffing layers (4) from the bottom to top, each floating stuffing layer (4) all correspondence is provided with one section traverse baffle (5), described traverse baffle (5) is staggered is positioned anaerobic device (2) inwall, described floating stuffing layer (4) is attached with halophilic microorganism group, and described exhalant region is provided with effluent weir (6), the rising pipe (7) that is communicated with effluent weir (6) and triphase separator (8).
2. the device for the treatment of the supersalinity used water difficult to degradate according to claim 1, it is characterized in that: described salinity homogeneous pond (1) is provided with the salinity measurement instrument (11) of waste water in the measuring cell, salinity homogeneous pond (1) is provided with waste water lifting device (12) in the pond, described waste water lifting device (12) is connected with water inlet manifold (3), and a relative angle is provided with whipping appts (13) in the described salinity homogeneous pond (1).
3. the device for the treatment of the supersalinity used water difficult to degradate according to claim 1 and 2, it is characterized in that: described water inlet manifold (3) is connected with some water inlet pipes (31), and described each water inlet pipe (31) is " rice " shape and is evenly arranged in anaerobic device (2) bottom.
4. the device for the treatment of the supersalinity used water difficult to degradate according to claim 1 is characterized in that: described floating stuffing layer (4) comprises a large amount of floating stuffings, and described floating stuffing is hexagon, has vesicular structure, and porosity is 80%-90%.
5. according to claim 1 or 4 described devices for the treatment of the supersalinity used water difficult to degradate, it is characterized in that: described floating stuffing layer (4) has four.
6. the device for the treatment of the supersalinity used water difficult to degradate according to claim 1 and 2, it is characterized in that: described triphase separator (8) comprises the multilayer incline-plate (81) of equidistant layout, be connected with the support plate (82) vertical with swash plate (81) on every layer of swash plate (81), described support plate (82) forms air chamber with swash plate (81), gas is housed on the described support plate (82) derives arm (83), described gas is derived arm (83) and is connected with the gas eduction tube (84) that is in communication with the outside, and described swash plate (81) comprises the plane of reflection (811) of below and the precipitation face (812) of top.
7. the device for the treatment of the supersalinity used water difficult to degradate according to claim 1 and 2 is characterized in that: be provided with the mud return line (9) that is communicated with anaerobic device (2) inside bottom the described anaerobic device (2).
8. method of utilizing the described device of claim 1 to process the supersalinity used water difficult to degradate is characterized in that: realize by following steps:
A, in the different saline environment of salinity, tame out the halophilic microorganism group of different grades with many parts of halophilic microorganisms, and every group of halophilic microorganism group is attached in the floating stuffing layer (4), floating stuffing layer (4) is encased in the anaerobic device (2), and arranges from bottom to up by the salinity order from high to low of saline environment between domestication;
B, waste water enter salinity homogeneous pond (1), and saltness is controlled at 3%-5%, are promoted to anaerobic device (2) by water inlet manifold (3);
C, waste water after anaerobic device (2) bottom enters with anaerobic device (2) mud contact, mix, remove the part hardly degraded organic substance by anaerobic sludge, waste water flows from bottom to top and passes through a plurality of floating stuffing layers (4) and multistage traverse baffle (5), remove in a large number hardly degraded organic substance by the halophilic microorganism group that is attached on the floating stuffing layer (4), be translated into biogas, increase hydraulic detention time by traverse baffle (5); Biogas and treated mud mixture carry out three phase separation after entering triphase separator (8), and the mud after the flocculation reenters in the anaerobic device (2), and the water after the processing is discharged from rising pipe (7), and biogas is discharged anaerobic device (2).
9. utilize supersalinity refractory wastewater method claimed in claim 8, it is characterized in that: in the domestication of described halophilic microorganism group, getting the many portions of supernatant liquors that contain Facultative Halophiles is inoculated into salinity and is respectively on 3%, 6%, 9%, 12% the film solid media, until grow the salt tolerant bacterium colony; Then get the immigration of salt tolerant colony inoculation and be equipped with in the corresponding liquid nutrient medium of identical salinity, under 30 ℃, carry out enrichment; After enrichment is finished the bacterium liquid in the liquid nutrient medium joined the autogamy salinity and be in 3%, 6%, 9%, 12% the corresponding waste water and tame cultivation, form halophilic microorganism group, and in joining waste water, add floating stuffing layer (4) as carrier, halophilic microorganism group is adhered on it.
10. utilize claim 8 or 9 described supersalinity refractory wastewater methods, it is characterized in that: described waste water detects salinity by salinity measurement instrument (11) in salinity homogeneous pond (1), mixed by whipping appts (13).
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| CN102910780B (en) | 2013-10-16 |
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